Cement-manufacturing apparatus.



F. WORM. CEMENT MANUFACTURING APPARATUS,

APPLIOATiOH FILED HAY 24, 1912.

I Patented Apr. 7, 1914.

6 SHEETS-SHEET 1.

F. WORM CEMENT MANUFACTURINGAPPARATUS.

Arpmonfqii rpm) .MAY 24, 1912. 1 O92,551 Patented Apr. 7, 1914.

I B 5/7 [4/ Wd, 5 rm/Z95 Wa /IA B F. WORM.

CEMENT MANUFACTURING APPARATUS. APPLICATION FILED MAY 24, 1912.

1,092,55 1-. Patented Apr. 7, 1914 5 SHEETS-SHEET a.

1 WORM. CEMENT MANUFACTURING APPARATUS.v

An LIqATIoN FILED MAY 24, 1912'.-

Patented Apr. 7, 19m

6 BHEETHKEET 4.

[/Zessgs; five /1702', 3 lyarm F. WORM.

CEMENT MANUFACTURING APPARATUS.

APPLICATION FILED MAY 24, 1912.

' 1,092,551 Patented Apr. 7, 1914 5 SHEETS-SHEET 5.

oii

. f B M- pan/L p/zzm- ,w%%w i (UNITED STATESPATENT OFFICE;

FRITZ WORM, OF LA SALLE, ILLINOIS, ASSIGNOR TO GERMAN-AMERICAN PORTLAND CEMENT WORKS, 013 LAISAIILILIE, ILLINOIS, A CORPORATION OF ILLINOIS.

CEMENR-MANUFACTURING arraniirus.

Specification of Letters Patent.

Patented Apr. 7, 1914,

Application filed May 24, 1912. Serial No. 699,393.

To all whom it may concern:

Be it known that I, Farmoam, a citizen of the United States, residing at La Salle, in the county of La 'Salle and State of Illinois, have invented certain new and. useful Improvements in Cement-Manufacturing Apparatus, of which the following is a specificat-ion.

My invention relates in general to cement manufacturing apparatus, and more particularly to the provision of dust collecting chambers between the feed end of a rotary kiln and the stack.

Inasmuch as the "round raw material is fed into a rotar kifn in' an opposite direction to the dra t theret-hrough, a considerable partof the raw material is carried up the stack by the draft, which results in waste, and is further objectionable in that the dust thus diverted from the kiln settles Y on the surrounding property.

The primary ob1eot of my invent-ion is to provide a series of passages and chambers between the feed end of the kiln and the stack, which will deflect the particles of 'the raw material and cause them to settle before they reach the stack, but. which" will not interfere with the draft requisite to the ellicient, operation of the kiln.

A further object of my invention is to provide apparatus for causing the dust andfine particles of raw material carried from the feed end of a kiln toward the stack to settle in collecting chambers, and to return the precipitated dust from the 'collecting cham bcrs to the feed hopper to be again supplied to the kiln. l

A still further object of my invention is to provide improvements in apparatus for manufacturing cement which will increase theeflici'ency thereof and will reduce the ex pense of operation.

My invention will be more fully described hereinafter with reference to the accompanying drawings, in which the same is illustrated as embodied in two convenient and practical forms, and in which? Figure l is a vertical longitudinal section of one embodiment of my invention; Fi 2, a sectional elevation on line 2 2, Fig 1; Fig.

and Fig. 10, a 'verticalsection on -supported p and G and which support a horizontal cov- 3, a sectional elevation on line 3 3, Fig. l; Fig. 4, asectional elevation on line 4 4, Fig. 1; Fig. 5, a horizontal section on line 5 5, Fig. 1; Fig. 6, a view similar to Fig. 1, showing a modified form of my invention; Fig. 7, a sectional plan view on l ne 7 7, Fig. 6.; Fig. 8, a sectional elevationtun line 8 8,Fig. 6; Fig. 9, a sectional elevation on line 9 9,

line 10 10, Fig. 6. to Similar reference characters are used to designate similar parts in the several figures of the drawings. 1'

A indicates the upper or feed end of a rotary cement kiln. 55f B designates the feed hopper from which the ground raw material is delivered through the outlet 12 to the screw conveyer C, and thence through the conduit 0' to the screw" conveyor D, which extends into the feed end" of the kiln A.

E indicates a screwconveyerpf or supplying material to the feed hopper B, the conyeyer E preferably communicating with a conveyer 2; extending above a lurality of hop- '75 'pers leading to individual kilns, suitable outlets being provided from the several hoppers. p

F indicates a chamber with which the feed end of the kiln A communicates through an opening g in the wall G; A curved dome v or roof f closes the upper end of the chamber F, the same being supported upon the inner surfaces of the walls G and G Above the dome f area series of beams G at their ends upon the walls G the conveyor '9 to eriug g, preferably made of a metallic plate. An air space is formed between the inner surface of the covering g and outer surface of the dome f which serves to conduct heat from the dome to the cover front which the heat is radiated. An opening g" 1s provided through the wall Gr alinin with the feed end of the kiln through which the interior of the kiln may be inspected. v

d designates an arch located below and m vertical alinem'etlt' with the conveyor Dl for affording a secure support for the conveycr,

.the ends of the arch being supported p ngb conveyers Q3;-

in Fig.3. One ofithel curved ends-of, the" dome j is supported upon the transverse wall Gr and its other curved end forms an arch beneath a'transverse wall'L. The chamber J communicates beneaththe' wall L with a" chamber K having 'acurveddome is support ed at its horizontal 1 side-edges ii'p'onj the parallel valls, H and H, as shown Fig.4. The curved ends of thedo'me 7a aresupport 'ed between the transverse 'wall L and; a.

transverse wall Mat the baseiof the stack' N. v An opening :m-is provided through thewall Mdmi'avplacingthe chamber K 'incommunication with the stack N. An inclined floor-nextends upwardly from thebottom' of the charnb er -K to th s wall 0 at the rear of the stack N, an'opening 0 for the ingress of air being provided through the wall 0 hove" the upper edge of the floor Extending beneath'the chambers F,J and K in planes transverseto'the kiln A, are. conduits P, P "and P Within which are located screw conveyers' Q, Q} and Q ,-re spectively; 'The conduits P, P and P are provided with curved roofs R, R and'R through which extend pairspf pipes g, g and which dit er g'e'hJ wardly from the respective conveyers'fifg 2 and Q The ends of thesc'divergingpipes extend through thecurved roofs'of thecon'duits and are provided with individual valves-or gates g of any suitable construction. A plurality of pairs of such diverging pipes leading to the conveyorsv are provided beneath each of the chambers'F-yylmnd K,'a s'shown in Fig. 5:. Depressirins" foamed above the ends of the diverging' iipes-g 'gyt and g by means of the transverse bridge walhs S- and S be tw'een'the conv eyers"@,, Q and Qfyand by means 'oi the longitudinal partitions s and H The-surfacesof the-bridge Walls S and S and of the longitudinal partitions-s and s converge downwardly"around the upper end of each of the pipes leading to the conveyers, and such surfaces, to ether with the cu rvefd miter surfaceof *the uemesf n', IR and R oveethe conduitsl fthfn hoppers'flin which th'e diist" is ollected and *iroinf which the du'stfiie delivered through f dit'erginlgj Q'tffand Q g 'rspec 2 tively. The ends of therc'ciivyers-Q; Q and'QF bver1ie"- aad -:dom nicate ivvith alongitudinal convey'er Qf' ezitends the: rear; of the Smokestack; where it' cdin g munrcates with the transverse conveyer 1.

conveye Q and receives the, dust therefrom at; its lower end,"the dust beingdis'c harged. .i from t the upper end j of the elevator U tlirough'a chute u to the feed 'coiiveyer E by hich the dust is-retulrned to the feed hopper B. y-" 'Any suitablemeansi nay be provided for operating the several conveyers and the elevator. V, *Etor nist'an'ce, indicates a pulleyto"which power is communicated and which, Ithrough sprocket Wheels and a connected chain, rotates the shaft v in the longitudinal conveyer Q. The sprocket wheels and chain An U lextends'upivardly the "85 ll connect the shaftawinrthe shaft 1) which, throughuneshed bevel gears, rotates thei zshafts in the 'several conveyers Q, Q and Q}. The rear end of thle shaft '1) is provided with a bevel gear' et which operates uuth sprocket Wheels and a Clltlll for rotating the shaftinthe conveyor, T. The eleva,

tor islshmvnas operated .by' an1 'otor,vV, and 7 suitable connections therefrom.

' W? ndicates a belt for operating the cbn- ,Veyer E through suitable power {connect-ions,

' The operation of theembo'diment ofgny' invention shown in Figs, 1 to: 55, inclusive, is f'as follows: Draft 'fron thc; feed endof the kiln A 'to the stack N'iisg doivmvardly throughtheehamber Fi benei th the wall Gr into the larger 'char'nber'- 'l, thence into the still larger chamber and thence through the somewhat restricted .opening' an in j the rtransverse' 'wall M, to the stack. Inasmuch as the horizontal cross section of, the'first 'chambenF iS greatergthanthe section of the kiln, the velocity of the draft'downwai'dly through the chamber F is less than the" vecrcss'section of the chamber J isgreater,

, locity through thekiln, and as the. vertical,

F, there is a further decreaseiinthe velocity of the draft through the said'char'nber- The vertical cross section of. thepchainbee through. The effect ofthe successive de-.

creasesjf in" the velocity. lofithe draft is.

to permit the articles ofgra v naterial to 'settle'f fwithin'the several pockets, .a bov e thecbranch pipes leading ,to. the. cone.

sa e at ach and the stack and a; cause the same to settle upouthe inclined well n being much larger than'thatof the pie- 50 beneath the upper end of the pipe 9 which,

- veyer C,

' passagew. y m with the stack N by which it is directed to the pockets abovetheboriveyer Q At predetermined intervals an operator walks through'the conduits opens the several valves material in the pocket controlled thereby has passed into the particular conveyer communicating therewith. v

Referring to Figs. 6 to 10, inclusive, which illustrate another embodiment of my invention, A designates the feed end of the rotary kiln, B the feed hopper from which ground raw material is supplied. to the conthrough pipe c,-to conveyer D, to the end of the kiln. (1 indicates an arch beneath the conveyer D for supporting the latter. the feed end of the kiln communicates and which is formed between iparallel trans verse walls G and G Extending 1ong1- tudinally across the chamber F beneath the end of the kiln is a curved dome or communicating through the chamber K'-. The chamber 'K' communicates through a somewhat restricted An opening 0 for permitting the ingress of air to the base of the stack is provided through the wall 0'. Extending transversely beneath the passage m is the conduit P having a curved dome or roof R". Located within the conduit P is a conveyer Q having diverging pipes q and g leading there: from through the walls of the conduit. 70 indicates. an inclined surface which extends downwardly'from the wall Gr at a plane adjacent the lower edge of the dome -l'.', to a plane beneath the end of the pipe g, which, together with the adjacent side wall of the conduit P, forms a hopper for directing collected dust to the end of the pipe 9. A downwardly inclined wall it extends from the base of the rear wall .0 to a plane together with the adjacent curved surface of the wall of the conduit P, forms a pocket from.

which material will flow into the pipe q. If and k? indicate downwardly convergmg surfaces leading to the open upper end of the wipe g which, together with the downwardly inclined surface la, forms a hopper leading to the pipe g". n indicates an inclined surface which, together with the inclosed 'surface, .n andthe inner ad acent portion of the base of the stack, constitutes a hopper leading tothe pipe 9 2 The conveyer Q, communicates with a longitudinal F indicates a chamber with which roof I' the wall. Gwith 1 send of; the kiln and the conveyer Q, which in turn leads to a transverse conveyer T at'the back of the apparatus. An'elevatori U receives material from the conveyer Q,- and elevates 'the same to a. pointaboveth'e'feed' 'conveyer U to which dust is delivered through a spoutit to be returned"to*thefeed 'liopper B'j and thence again supplied to th'e' kiln' r If The operation "of the-forrrf of any; invention above described in connection with Figs.

6 to 10 is similar to the operation Ofthdln bodiment of my' inven'tion' first-=described and illustratedin; Figsi=- 1'; to 5,- inclusive. The draft 7 froin' 'the' kilm to the 1 stack Q is through the chamber F thence around and beneath the dome I into the chamber K which communicates through the" restricted passageway mf-with thebase of thestack N. The domeI 'serves to ehange'the'diree tion of draft andthereby cause'lnllch et'the dust to fall-upon? the inclined bottom wall and to be guided thereby-into -thepocket or hopper above the pipe g' i The-increased cross sectionof the chamber-K causes: a de= crease in the velocity 1 of the draft I there; through," so :-that f the dust rno'rfe readily settles: The air passing through the open ing' 0 serves to obstruct; the pass'age of *the particles of raw materialinto' the staclcand- 'to cause such particles to falliiitb "the pocket leading to the -i p'ipe .1}? -At predetermined intervals an operator "opens "suitable valves pr gates q"'inthe'apipesg and -9 and permits the dustl'which" has collected in'the hoppers above 5 such pipes to flow 5 through them into the, conveyer Q,- to be thence returned to the feedvhopper. Y

From the foregoing description ofthe two embodiments of my invention herein disclosed, it-will be observed that by my inventionthe particles of raw material which are carried by the draft-from the feed end of the Fn'ln toward the'stack, are caused to settle before reaching the stack, and the dust thus collected may thenbe returned to the feed hopper to heagain supplied to the kiln. gThe direction-of the draft is changed and its velocity decreased so as to cause the particles of raw material to be recipitated and to fall by gravity into 'p0c ets and to thereby be prevented stack. a v

My invention results not only in saving in the expense of operation, owing to the efiici'cnt collection of the dustybut also avoids injury tothe surrounding roperty which otherwise results from the eposit thereon pfl the dust carried'up the stack fromthe (1 n.

from passing into the I claim: .1. The combination with a cement kilnof a stack, a dust collecting chamber intermediate of and communicating with the feed stack, said chamber I I: 1 I

miseries-g :p ortions progressively larger in cross section t ward'fthe stack toefiect the settling of particles of material by the'decreased velocity. through said chamber,. and

a passage way .throug'h'which said chamber communicates with the stack of less area v than the cross section of the chamber.--

2. The combination-with a cement kiln of a stack, a dust collecting chamber intermediate of and communicatingwith the feed end of the kiln and the stack, said-chamber comprising portions progressively larger-in cross section toward the stack to efiect the settlin of particles of material by the decrease velocity; through 1 said chamber, a passage-way through which said chamber communicates with the stack of less area than the cross section of the -chamber, and

anfinclin'ed wall extending upv'sf grdly from said chamber through saidpassage-way to the rear 'wall of. the stack.

3. The combination with a cement kiln, of I a stack, a plurality-cf dust collecting chambers' intermediate of and communicating with-the feed end of the kilnand the stack, said chambers being progressively larger in cross section toward the stack, and a chamber adjacent the stack communicating therewith through a passage of less area than the cross section of said chamber. .4

i. The combination with a cementhiln, of a "stack, a dust collecting chamber inter mediate of and communicating with the feed end of a. kiln and the stack, the cross section of which is greater than the cross sections of the kiln and stack, a passageway through which said chamber communicates with the stack of less area than the cross section of the chamber, and means for admitting air-into the stack at a point therein opposite its} communication with said 'passageway. v 1

The combination with a cement kiln; of a stack, a dust collecting chamber intermediate of and communicating with the feed end of the kiln and the stack, the cross section of which is greater than the cross sections of the kiln and stack and gradually increases in cross section toward the stack, a passageway through which said chamber communicateswith the stack of less area than the cross section of the chamber, a .dust receivin wpocket in the bottom wall of said cham erf' and an. inclined wall ex tending upwardly. from said pocket through said passageway stack.

I 6. The combination with a cement kiln, of a'stack, a, dust .collecting chamber intermediate ot' a'nd communicating with the feed-end ofthe kiln and the stack,'the"cross section "of which greater than the cross sections of the kiln and stack, a passageway through which said chamber communicates said chambers for receiviii -throughthe to the rear wall of the .1 with" the tact; of less;areajthaxijthe cross section of =theE'cl1auiber 'a dust receiving pocket in'the bottom we; of said chamber,

an inclinedwall extending 'iipwiirdl'y from said pocket'through said passageway to the rear wall of the stack and meansfor admitting air into the sta'clr at 111 point above the direction of the draft through them; said--f third chamber communicatingthro lia re"- stricted passage with the stack, a. plurality of pockets formed in thejbottom walls of the precipitated dust and an inclined wa wardly from the pocketsfadjacent the-stack passage leading tqthe' rear wall of'the staclc' 8: The" combination' witha ceme nt vkiln,

extending, up;

of a;stack-','jtdust collecting chamber through which the kiln communicates with the stack, a plurality-of pockets at the bottom of said chamber, a conduit extending transversely of said chamber at a level below said pockets,

a conveyer within said conduit, and upwardly diverging pairs of pipes within said conduit leadin from said conveyer and openin into ad jacentpockets i 9. T e combination'witha cement kiln,

of a stack, adust collecting chamber through which the kiln communicates with the stack, a plurality of ockets. at Vthebotto'm of said chamber exten ing transversely of the draft there'through, a cOnVeyer located beneath said pockets, a conduit -extending downwardly from each of said pockets-and com-- municating with'said 'conveyer', and, a valve controlling each of I said 1 conduitswhereby opened and the collect d. a g ifg said conveyen when the desired manates-d st; iS'QOllected in said pockets :saidyalvesm y be I 10. The combination withlaicsment kilnfj of a staclna chamber,ffi ithmhichgthe feed,

end of the kiln communicates; a second cha'mher with which said :firstchamber communica'tes at a level-below the sndof the.

kiln, and a third chamber intern ediate'of and communicating with said second cham- 'ber andthe stack, said chambers being of progressively greater cross section transvlersely of the direction of the draft through t em.

11. The combination with a cement kiln,

said chamber opposite the feed end of the having an opening therein alining with the kiln, and a second chamber communicating with said first chamber and" located at a level below the end of the kiln, Said second chamber, being of greater cross-"secmy name.

tion than said first chamber-transversely of the. direction of the draft therethrough. 1

In testimony whereof, I havev subscribed FRITZ WORM. Witnesses:

HENRY A. PARKS, E. M. ANDERSON.

Copies of this patent may beobtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. m 

